Document
UBA2037
Full bridge control IC for HID general lighting
Rev. 01 — 30 October 2008
Product data sheet
1. General description
The UBA2037 is a high voltage monolithic Integrated Circuit (IC) manufactured in a High Voltage Silicon On Insulator (HVSOI) process. This circuit is designed for driving MOSFETs in a full bridge configuration. In addition, it features a disable function, an internal adjustable oscillator and an external clock input function with a high-voltage level shifter for driving the bridge. To guarantee an accurate 50 % duty cycle, the oscillator signal can be passed through a divider before being fed to the output drivers.
The UBA2037 is especially suitable for High Intensity Discharge (HID) lamp drivers for projectors and general lighting applications.
2. Features
I Full bridge driver circuit I Integrated bootstrap diodes I 464 V integrated high voltage level shift function to drive HID lamps below ground level I 550 V series regulator input to make the internal supply I 550 V maximum bridge voltage I Accurate bridge disable function I Input for start-up delay I Adjustable oscillator frequency I Selectable frequency divider I Predefined bridge position during start-up I Adaptive non-overlap
3. Applications
I The UBA2037 can drive (via the power MOSFETs) any kind of load in a full bridge configuration.
I The circuit is especially designed as a commutator controller for HID lamps in projectors and general lighting applications.
NXP Semiconductors
UBA2037
Full bridge control IC for HID general lighting
4. Ordering information
Table 1. Ordering information
Type number
Package
Name
Description
UBA2037T
SO24
plastic small outline package; 24 leads; body width 7.5 mm
UBA2037TS
SSOP28 plastic shrink small outline package; 28 leads; body width 5.3 mm
5. Block diagram
Version SOT137-1 SOT341-1
VSS(CLK) CLK 12
6 HV
14 SGND
STABILIZER
VDD 9 RC 13
OSCILLATOR
10 SU
12 BD
1.29 V bridge disable
Fig 1. Block diagram
VDD(CLK) 3
LOGIC SIGNAL GENERATOR
÷2
HIGH VOLTAGE LEVEL SHIFTER
UBA2037TS
LOGIC
LOW VOLTAGE LEVEL SHIFTER
11 DD
HIGHER LEFT DRIVER
HIGHER RIGHT DRIVER
LOWER RIGHT DRIVER
LOWER LEFT DRIVER
16 FSL
15 GHL
17 SHL
27 FSR
28 GHR
26 SHR 23
GLR
21 PGND
20 GLL
4, 5, 7, 8, 18, 19, 22, 24, 25 n.c. 014aaa635
UBA2037_1
Product data sheet
Rev. 01 — 30 October 2008
© NXP B.V. 2008. All rights reserved.
2 of 14
NXP Semiconductors
6. Pinning information
6.1 Pinning
UBA2037
Full bridge control IC for HID general lighting
VSS(CLK) 1 CLK 2
VDD(CLK) 3 n.c. 4 HV 5 n.c. 6 VDD 7 SU 8 DD 9 BD 10 RC 11
SGND 12
UBA2037T
24 GHR 23 FSR 22 SHR 21 n.c. 20 GLR 19 n.c. 18 PGND 17 GLL 16 n.c. 15 SHL 14 FSL 13 GHL
014aaa636
Fig 2. SO24 package
VSS(CLK) 1 CLK 2
VDD(CLK) 3 n.c. 4 n.c. 5 HV 6 n.c. 7 n.c. 8 VDD 9 SU 10 DD 11 BD 12 RC 13
SGND 14
UBA2037TS
28 GHR 27 FSR 26 SHR 25 n.c. 24 n.c. 23 GLR 22 n.c. 21 PGND 20 GLL 19 n.c. 18 n.c. 17 SHL 16 FSL 15 GHL
014aaa637
Fig 3. SSOP28 package
6.2 Pin description
Table 2. Symbol
VSS(CLK) CLK VDD(CLK) n.c. n.c. HV n.c. n.c. VDD SU DD BD RC SGND GHL FSL SHL n.c.
Pin description
Pin Pin
Description
UBA2037T UBA2037TS
11
negative supply voltage for logic oscillator input
22
oscillator input
33
positive supply voltage for logic oscillator input
44
not connected
5 not connected
56
high voltage supply input for internal series regulator
67
not connected
8 not connected
79
internal low voltage supply
8 10
input for start-up delay
9 11
input for divider disable
10 12
input for bridge disable
11 13
RC input for internal oscillator
12 14
signal ground
13 15
gate driver output for upper left MOSFET
14 16
floating supply left
15 17
source upper left MOSFET
16 18
not connected
UBA2037_1
Product data sheet
Rev. 01 — 30 October 2008
© NXP B.V. 2008. All rights reserved.
3 of 14
NXP Semiconductors
UBA2037
Full bridge control IC for HID general lighting
Table 2. Symbol
n.c. GLL PGND n.c. GLR n.c. n.c. SHR FSR GHR
Pin description …continued
Pin Pin
Description
UBA2037T UBA2037TS
19 not connected
17 20
gate driver output for lower left MOSFET
18 21
power ground
19 22
not connected
20 23
gate driver output for lower right MOSFET
21 24
not connected
25 not connected
22 26
source upper right MOSFET
23 27
floating supply right
24 28
gate driver upper right MOSFET
7. Functional description
7.1 Supply voltage
The UBA2037 is powered by a supply voltage applied to pin HV, e.g. the supply voltage of the full bridge. The IC generates its own low supply voltage for its internal circuitry. Therefore an additional low voltage supply is not required. A capacitor has to be connected to pin VDD to obtain a ripple-free internal supply voltage. The circuit can also be powered by a low voltage supply directly applied to pin VDD. In this case pin HV should be connected to pin VDD or pin SGND. The maximum current that the internal series regulator can deliver, is temperature dependent. This is shown in Figure 4.
7.2 Star.